I've suffered from tinnitus for my entire adult life. Mine started with being at a shooting range and someone next to me starting firing a semi auto .45 handgun without making sure I had my ears covered. The gunfire sounds reflected off the metal roofing covering the standing area and just made it worse. I had loud ringing in my ears for days after that. That was when I was 15 or 16. Now, 25 years later, I still suffer an incessant high pitched ringing in my ears. It literally never goes away although I've learned to live with it.
Being in super quiet areas, the ringing can be so loud comparatively that I can't do anything else but focus on it. It doesn't affect my actual hearing much, if any, at all. Although I've lost a bit of high frequency hearing I think that's mostly just because of me knocking on my 40th year and not the tinnitus itself. It does force me to sleep with a white noise machine so that as I fall asleep my brain doesn't focus on the ringing.
I can generally ignore it but it's there every single waking hour of my life. I can definitely see it driving some people to thoughts of suicide. I've tried many methods of making it go away and nothing has ever worked. The best thing for me is to find something to focus my attention away from it. If I'm otherwise occupied, I don't really pay attention to it. Whether that's a movie, a good book, music, playing a game or literally anything else.